package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import static com.alibaba.druid.sql.ast.TDDLHint.Type.JSON;

@Slf4j
@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    AddressBookMapper addressBookMapper;
    @Autowired
    ShoppingCartMapper shoppingCartMapper;
    @Autowired
    OrdersMapper ordersMapper;
    @Autowired
    OrderDetailMapper orderDetailMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer webSocketServer;
    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //校验是否含有地址簿和购物车必要数据，如有没有抛出对应异常防止空数据访问数据库
        //校验地址簿信息是否存在
        Long addressBookId=ordersSubmitDTO.getAddressBookId();
        AddressBook addressBook = addressBookMapper.getById(addressBookId);
        if (addressBook==null){
            //抛出业务异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        //校验购物车信息是否存在
        Long userId= BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder()
                                    .userId(userId)
                                    .build();
        List<ShoppingCart> shoppingCarts = shoppingCartMapper.list(shoppingCart);
        if(shoppingCarts==null||shoppingCarts.size()==0){
            //抛出业务异常
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //向订单信息表插入1条数据
        Orders orders=new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setUserId(userId);
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setConsignee(addressBook.getConsignee());
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        ordersMapper.insert(orders);
        //向订单明细表插入n条数据
        List<OrderDetail> orderDetailList=new ArrayList<>();
        for (ShoppingCart cart : shoppingCarts) {
            OrderDetail orderDetail=new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);
        //清空当前用户的购物车数据
        shoppingCartMapper.deleteBYUserId(userId);
        //封装VO数据返回
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .orderNumber(orders.getNumber())
                .orderTime(orders.getOrderTime())
                .orderAmount(orders.getAmount())
                .id(orders.getId())
                .build();
        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = ordersMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        ordersMapper.update(orders);

        //通过WebSocket向客户端浏览器推送消息 type orderId content
        Map map=new HashMap();
        map.put("type",1);//1表示来单提醒，2表示催单
        map.put("orderId",ordersDB.getId());
        map.put("content","订单编号"+outTradeNo);
        String json = JSONObject.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }

    /**
     * 历史订单查询
     * @param pageNum 页面
     * @param pageSize 每页记录数
     * @param status 订单状态
     * @return
     */
    public PageResult pageQuery(Integer pageNum, Integer pageSize, Integer status) {
        PageHelper.startPage(pageNum,pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO=new OrdersPageQueryDTO();
        ordersPageQueryDTO.setStatus(status);
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        Page<Orders> page=ordersMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> list=new ArrayList<>();
        if(page!=null&&page.getTotal()!=0){
            for (Orders orders : page) {
                Long orderId = orders.getId();
                List<OrderDetail> orderDetailList=orderDetailMapper.getByOrderId(orderId);
                OrderVO orderVO=new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                orderVO.setOrderDetailList(orderDetailList);
                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(),list);
    }

    /**
     * 查询订单详情
     * @param id
     * @return
     */
    public OrderVO details(Long id) {
        Orders orders=ordersMapper.getById(id);
        List<OrderDetail> list=orderDetailMapper.getByOrderId(orders.getId());
        OrderVO orderVO=new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        AddressBook addressBook = addressBookMapper.getById(orders.getAddressBookId());
        String address=addressBook.getProvinceName()+addressBook.getCityName()+addressBook.getDetail();
        orderVO.setAddress(address);
        orderVO.setOrderDetailList(list);
        return orderVO;
    }

    /**
     * 用户取消订单
     * @param id
     */
    public void userCancel(Long id) throws Exception {
        Orders ordersDB = ordersMapper.getById(id);
        if (ordersDB==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        if (ordersDB.getStatus()>2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders=new Orders();
        orders.setId(ordersDB.getId());
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            weChatPayUtil.refund(
                    ordersDB.getNumber(), //商户订单号
                    ordersDB.getNumber(), //商户退款单号
                    new BigDecimal(0.01),//退款金额，单位 元
                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
            orders.setStatus(Orders.CANCELLED);
            orders.setCancelReason("用户取消");
            orders.setCancelTime(LocalDateTime.now());
            ordersMapper.update(orders);
        }
    }

    /**
     * 用户再来一单
     * @param id
     */
    public void repetition(Long id) {
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        List<ShoppingCart> shoppingCartList=orderDetailList.stream().map(x->{
            ShoppingCart shoppingCart=new ShoppingCart();
            BeanUtils.copyProperties(x,shoppingCart,"id");
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCart.setUserId(BaseContext.getCurrentId());
            return shoppingCart;
        }).collect(Collectors.toList());
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 订单搜索
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        Page<Orders> page = ordersMapper.pageQuery(ordersPageQueryDTO);
        List<Orders> orders = page.getResult();
        List<OrderVO> orderVOList = new ArrayList<>();
        for (Orders order : orders) {
            OrderVO orderVO=new OrderVO();
            BeanUtils.copyProperties(order,orderVO);
            List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(order.getId());
            String orderDishes=orderDetailList.stream().map(orderDetail ->
                orderDetail.getName()+orderDetail.getNumber()
            ).collect(Collectors.joining(";"));
            orderVO.setOrderDishes(orderDishes);
            AddressBook addressBook = addressBookMapper.getById(order.getAddressBookId());
            String address=addressBook.getProvinceName()+addressBook.getCityName()+addressBook.getDetail();
            orderVO.setAddress(address);
            orderVOList.add(orderVO);
        }
        return new PageResult(page.getTotal(),orderVOList);
    }

    /**
     *根据订单状态查询数量
     * @return
     */
    public OrderStatisticsVO statistics() {
        Integer toBeConfirmed = ordersMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = ordersMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = ordersMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);
        OrderStatisticsVO orderStatisticsVO = OrderStatisticsVO.builder()
                .toBeConfirmed(toBeConfirmed)
                .confirmed(confirmed)
                .deliveryInProgress(deliveryInProgress)
                .build();
        return orderStatisticsVO;
    }

    /**
     * 接单
     * @param ordersConfirmDTO
     */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders  orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        ordersMapper.update(orders);
    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        Orders ordersDB = ordersMapper.getById(ordersRejectionDTO.getId());
        if(ordersDB==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        if(!ordersDB.getStatus().equals(Orders.REFUND)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == Orders.PAID) {
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);
        }
        Orders  orders = Orders.builder()
                .id(ordersRejectionDTO.getId())
                .status(Orders.CANCELLED)
                .rejectionReason(ordersRejectionDTO.getRejectionReason())
                .cancelTime(LocalDateTime.now())
                .build();
        ordersMapper.update(orders);
    }

    /**
     * 商家取消订单
     * @param ordersCancelDTO
     */
    public void Cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        Orders ordersDB = ordersMapper.getById(ordersCancelDTO.getId());
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == 1) {
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);
        }
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        ordersMapper.update(orders);
    }

    /**
     * 派送订单
     * @param id
     */
    public void delivery(Long id) {
        Orders orderDB = ordersMapper.getById(id);
        if(orderDB==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        if(!orderDB.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(id);
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        ordersMapper.update(orders);
    }

    /**
     * 完成订单
     * @param id
     */
    public void complete(Long id) {
        Orders orderDB = ordersMapper.getById(id);
        if(orderDB==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        if(!orderDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(id);
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        ordersMapper.update(orders);
    }

    /**
     * 用户催单
     * @param id
     */
    public void reminder(Long id) {
        //根据id查询数据库
        Orders orderDB = ordersMapper.getById(id);
        if(orderDB==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        Map map=new HashMap<>();
        map.put("type",2);//1表示来单提醒，2表示客户催单
        map.put("orderId",id);
        map.put("content","订单编号为"+ orderDB.getNumber());
        String json = JSONObject.toJSONString(map);
        //通过WebSocket向客户端浏览器推送消息
        webSocketServer.sendToAllClient(json);
    }
}
